/* Shared guide layout for long-form concept pages. */
:root {
      --ink: #0b1220;
      --paper: #f7f8fc;
      --cream: #eef1f9;
      --accent: #5b4de3;
      --accent-2: #0f766e;
      --muted: #475569;
      --border: #c8d0df;
      --accent-light: #eceaff;
      --focus: rgba(91, 77, 227, 0.7);
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: calc(2rem + env(safe-area-inset-top, 0px));
    }

    body {
      background: var(--paper) !important;
      color: var(--ink) !important;
      font-family: 'Noto Serif SC', serif !important;
      line-height: 1.8 !important;
      min-height: 100vh;
    }

    .typora-export-content {
      display: block !important;
    }

    .typora-export-sidebar {
      display: none !important;
    }

    #write {
      max-width: none !important;
      width: 100% !important;
      padding: 0 !important;
      margin: 0 !important;
      background: transparent !important;
      box-shadow: none !important;
      font-size: 16px !important;
    }

    #write :is(p, li) {
      overflow-wrap: anywhere;
      word-break: break-word;
    }

    #write :is(table, pre) {
      max-width: 100%;
    }

    #write figure,
    #write .table-figure {
      width: 100%;
      max-width: 100%;
      min-width: 0;
      margin-left: 0;
      margin-right: 0;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }

    #write .table-figure > table {
      width: max-content;
      min-width: 100%;
      max-width: none;
    }

    #write pre {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }

    #write h1,
    #write h2,
    #write h3,
    #write h4,
    #write h5,
    #write h6,
    #write p,
    #write ul,
    #write ol {
      margin: 0;
      padding: 0;
    }

    #write p,
    #write li,
    #write span {
      white-space: normal !important;
    }

    header {
      background: var(--ink);
      color: var(--paper);
      padding: 4rem 2rem 3rem;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    header::before {
      content: '';
      position: absolute;
      inset: 0;
      background: repeating-linear-gradient(45deg,
          transparent,
          transparent 40px,
          rgba(255, 255, 255, 0.02) 40px,
          rgba(255, 255, 255, 0.02) 41px);
    }

    .header-label {
      font-family: 'Space Mono', monospace;
      font-size: 0.65rem;
      letter-spacing: 0.3em;
      color: rgba(15, 118, 110, 0.95);
      text-transform: uppercase;
      margin-bottom: 1.2rem;
      position: relative;
    }

    header h1 {
      font-family: 'Cormorant Garamond', serif;
      font-size: clamp(2.1rem, 6vw, 3.8rem);
      font-weight: 300;
      letter-spacing: 0.04em;
      margin-bottom: 0.6rem;
      line-height: 1.2;
      position: relative;
    }

    header h1 .title-gender {
      color: var(--accent);
    }

    .header-sub {
      font-size: 0.85rem;
      color: rgba(247, 248, 252, 0.6);
      letter-spacing: 0.1em;
      margin-top: 1rem;
      font-family: 'Space Mono', monospace;
      position: relative;
    }

    .header-ornament {
      margin: 2rem auto 0;
      width: 64px;
      height: 1px;
      background: linear-gradient(to right, transparent, rgba(91, 77, 227, 0.9), transparent);
      position: relative;
    }

    .intro-section {
      max-width: 820px;
      margin: 0 auto;
      padding: 3.2rem 2rem 2rem;
    }

    .intro-section p {
      font-size: 0.95rem;
      color: var(--muted);
      margin-bottom: 1rem;
      font-weight: 300;
    }

    .intro-section strong {
      color: var(--accent-2);
      font-weight: 600;
    }

    .divider {
      width: 100%;
      height: 1px;
      background: linear-gradient(to right, transparent, var(--border), transparent);
      margin: 2rem 0;
    }

    .main-content {
      max-width: 980px;
      margin: 0 auto;
      padding: 0 2rem 4rem;
    }

    .category-section {
      margin-bottom: 3.5rem;
      scroll-margin-top: 2rem;
    }

    .category-title {
      font-family: 'Space Mono', monospace;
      font-size: 0.65rem;
      letter-spacing: 0.3em;
      color: var(--accent-2);
      text-transform: uppercase;
      margin-bottom: 1.5rem;
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .category-title::after {
      content: '';
      flex: 1;
      height: 1px;
      background: var(--border);
    }

    .terms-grid {
      display: grid;
      grid-template-columns: minmax(0, 1fr);
      gap: 1.2rem;
      justify-items: center;
    }

    .toc-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
      justify-items: stretch;
    }

    .term-card {
      background: var(--cream);
      border: 1px solid var(--border);
      padding: 1.85rem;
      position: relative;
      color: var(--ink);
      width: 100%;
      max-width: 860px;
      min-width: 0;
    }

    .term-card.highlight {
      background: var(--ink);
      border-color: var(--ink);
      color: var(--paper);
    }

    .term-card.highlight .term-en {
      color: var(--accent);
    }

    .term-card.highlight .term-desc {
      color: rgba(247, 248, 252, 0.78);
    }

    .term-corner {
      position: absolute;
      top: 0;
      right: 0;
      width: 0;
      height: 0;
      border-style: solid;
      border-width: 0 18px 18px 0;
      border-color: transparent var(--border) transparent transparent;
    }

    .term-card.highlight .term-corner {
      border-color: transparent rgba(91, 77, 227, 0.95) transparent transparent;
    }

    .term-en {
      font-family: 'Cormorant Garamond', serif;
      font-size: 1.45rem;
      font-weight: 400;
      font-style: italic;
      color: rgba(91, 77, 227, 0.95);
      display: block;
      margin-bottom: 0.2rem;
      line-height: 1.2;
    }

    .term-zh {
      font-size: 0.7rem;
      font-family: 'Space Mono', monospace;
      letter-spacing: 0.15em;
      color: var(--muted);
      display: block;
      margin-bottom: 0.85rem;
    }

    .term-card.highlight .term-zh {
      color: rgba(247, 248, 252, 0.55);
    }

    .term-desc {
      min-width: 0;
      max-width: 100%;
      font-size: 0.9rem;
      line-height: 1.75;
      font-weight: 300;
      color: #1f2937;
    }

    .term-card.highlight .term-desc {
      color: rgba(247, 248, 252, 0.8);
    }

    #write .term-desc strong {
      color: var(--accent-2);
      font-weight: 600;
    }

    #write .term-card.highlight .term-desc strong {
      color: rgba(180, 176, 255, 0.96);
    }

    #write .term-desc a {
      color: rgba(91, 77, 227, 0.95);
      text-decoration-color: rgba(91, 77, 227, 0.35);
      text-underline-offset: 0.16em;
      transition: color 0.2s ease, text-decoration-color 0.2s ease;
    }

    #write .term-desc a:hover {
      color: var(--accent-2);
      text-decoration-color: currentColor;
    }

    #write .term-card.highlight .term-desc a {
      color: rgba(180, 176, 255, 0.98);
      text-decoration-color: rgba(180, 176, 255, 0.45);
    }

    #write .term-desc :is(h2, h3, h4, h5, h6)[data-level] {
      margin: 1.05rem 0 0.55rem;
      line-height: 1.35;
      font-weight: 600;
      font-size: 1rem;
      color: var(--ink);
    }

    #write .term-card.highlight .term-desc :is(h2, h3, h4, h5, h6)[data-level] {
      color: rgba(247, 248, 252, 0.92);
    }

    #write .term-desc :is(h2, h3, h4, h5, h6)[data-level="2"] {
      padding-left: 0.85rem;
      font-size: 0.98rem;
    }

    #write .term-desc :is(h2, h3, h4, h5, h6)[data-level="3"] {
      padding-left: 1.7rem;
      font-size: 0.96rem;
    }

    #write .term-desc :is(h2, h3, h4, h5, h6)[data-level="4"] {
      padding-left: 2.55rem;
      font-size: 0.94rem;
    }

    #write .term-desc :is(h2, h3, h4, h5, h6)[data-level="5"] {
      padding-left: 3.4rem;
      font-size: 0.92rem;
    }

    #write .term-desc :is(h2, h3, h4, h5, h6)[data-level]::before {
      content: none !important;
    }

    #write .card-num {
      margin-right: 0.35em;
      font-family: 'Space Mono', monospace;
      font-size: 0.8em;
      letter-spacing: 0.04em;
      color: rgba(91, 77, 227, 0.95);
    }

    #write .term-desc p {
      margin: 0.85rem 0;
    }

    #write .term-desc p+p {
      margin-top: 0.55rem;
    }

    #write .term-desc ul,
    #write .term-desc ol {
      margin: 0.85rem 0 0.45rem;
      padding-left: 1.2rem;
    }

    #write .term-desc li {
      margin: 0.25rem 0;
    }

    #write .term-desc .guide-note {
      margin: 1rem 0;
      padding: 0.95rem 1rem;
      border-left: 3px solid rgba(91, 77, 227, 0.75);
      background: rgba(91, 77, 227, 0.07);
      color: #334155;
      font-size: 0.88rem;
      line-height: 1.7;
    }

    #write .term-card.highlight .term-desc .guide-note {
      border-left-color: rgba(140, 132, 255, 0.95);
      background: rgba(247, 248, 252, 0.08);
      color: rgba(247, 248, 252, 0.88);
    }

    #write .term-desc .guide-note p {
      margin: 0.35rem 0;
    }

    #write .term-desc .guide-note-title {
      display: block;
      margin-bottom: 0.25rem;
      font-family: 'Space Mono', monospace;
      font-size: 0.68rem;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: rgba(91, 77, 227, 0.95);
    }

    #write .term-card.highlight .term-desc .guide-note-title {
      color: rgba(180, 176, 255, 0.96);
    }

    .toc-card {
      display: block;
      text-decoration: none;
      color: inherit;
    }

    .term-card.toc-card:not(.highlight):hover {
      background: rgba(91, 77, 227, 0.06);
      border-color: rgba(91, 77, 227, 0.35);
    }

    .toc-card:focus-visible {
      outline: 2px solid var(--focus);
      outline-offset: 3px;
    }

    .floating-toc {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 999;
      font-family: 'Space Mono', monospace;
    }

    .toc-toggle-btn {
      background: rgba(11, 18, 32, 0.92);
      border: 1px solid rgba(91, 77, 227, 0.75);
      width: 54px;
      height: 54px;
      border-radius: 999px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 10px 22px rgba(0, 0, 0, 0.22);
      color: rgba(247, 248, 252, 0.92);
      font-size: 1.25rem;
      font-weight: 700;
    }

    .toc-toggle-btn:focus-visible {
      outline: 2px solid var(--focus);
      outline-offset: 3px;
    }

    .toc-panel {
      position: absolute;
      bottom: 66px;
      right: 0;
      width: 300px;
      max-width: 85vw;
      background: var(--cream);
      border: 1px solid rgba(91, 77, 227, 0.65);
      box-shadow: 0 14px 30px rgba(0, 0, 0, 0.24);
      padding: 1.2rem 0.85rem;
      border-radius: 0;
      max-height: min(70vh, 520px);
      overflow: auto;
      opacity: 0;
      visibility: hidden;
      pointer-events: none;
    }

    .toc-panel.open {
      opacity: 1;
      visibility: visible;
      pointer-events: auto;
    }

    .toc-panel-header {
      font-family: 'Space Mono', monospace;
      font-size: 0.7rem;
      letter-spacing: 0.2em;
      color: var(--accent-2);
      text-transform: uppercase;
      border-bottom: 1px solid var(--border);
      padding-bottom: 0.5rem;
      margin-bottom: 0.8rem;
      display: flex;
      justify-content: space-between;
      align-items: baseline;
    }

    .toc-close-icon {
      cursor: pointer;
      font-size: 1rem;
      color: var(--muted);
    }

    .toc-list {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .toc-list li {
      margin: 0.65rem 0;
    }

    .toc-list a {
      display: flex;
      align-items: baseline;
      gap: 0.6rem;
      font-family: 'Noto Serif SC', serif;
      font-size: 0.86rem;
      color: var(--ink);
      text-decoration: none;
      padding: 0.55rem 0.65rem;
      border-left: 2px solid transparent;
    }

    .toc-list a:hover {
      background: rgba(91, 77, 227, 0.08);
      border-left-color: rgba(91, 77, 227, 0.65);
      color: rgba(15, 118, 110, 0.95);
    }

    .toc-list a[aria-current="true"] {
      background: rgba(91, 77, 227, 0.09);
      border-left-color: rgba(91, 77, 227, 0.85);
      color: rgba(15, 118, 110, 0.95);
    }

    .toc-index {
      font-family: 'Space Mono', monospace;
      font-size: 0.65rem;
      color: rgba(91, 77, 227, 0.9);
      font-weight: 700;
      width: 24px;
      display: inline-block;
      letter-spacing: 0;
    }

    .toc-title {
      flex: 1;
      line-height: 1.3;
    }

    .term-tags,
    .term-tag {
      display: none !important;
    }

    body.guide-building #write {
      opacity: 0;
    }

    body.guide-ready #write {
      opacity: 1;
      transition: opacity 0.16s ease;
    }

    .prism-back-home {
      position: fixed;
      top: calc(16px + env(safe-area-inset-top, 0px));
      left: calc(16px + env(safe-area-inset-left, 0px));
      z-index: 9999;
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 8px 12px;
      border: 1px solid rgba(24, 33, 47, 0.14);
      border-radius: 8px;
      background: rgba(255, 255, 255, 0.92);
      color: #6a7b8f;
      font: 600 13px/1.2 "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
      text-decoration: none;
      box-shadow: 0 8px 24px rgba(24, 33, 47, 0.10);
      backdrop-filter: blur(12px);
    }

    .prism-back-home:hover {
      color: #111111;
      border-color: rgba(24, 33, 47, 0.26);
    }

    .prism-back-home:focus-visible {
      outline: 2px solid #1e5f65;
      outline-offset: 2px;
    }
    @media (max-width: 600px) {
      .terms-grid {
        grid-template-columns: minmax(0, 1fr);
      }

      .toc-grid {
        grid-template-columns: 1fr;
      }

      #write .card-num {
        display: none;
      }

      header {
        padding: 3.4rem 1.4rem 2.6rem;
      }

      .intro-section {
        padding: 2.6rem 1.4rem 1.6rem;
      }

      .main-content {
        padding: 0 1.4rem 3.4rem;
      }

      .term-card {
        padding: 1.35rem;
      }

      .floating-toc {
        bottom: 16px;
        right: 16px;
      }

      .toc-toggle-btn {
        width: 48px;
        height: 48px;
        font-size: 1.3rem;
      }

      .toc-panel {
        bottom: 62px;
        width: min(92vw, 360px);
      }

      .toc-list a {
        font-size: 0.78rem;
        padding: 0.3rem 0.4rem;
      }

      .prism-back-home {
        top: calc(10px + env(safe-area-inset-top, 0px));
        left: calc(10px + env(safe-area-inset-left, 0px));
        padding: 7px 10px;
        font-size: 12px;
      }
    }

    :root[data-theme="dark"] {
        --ink: #e7eaf3;
        --paper: #0e131d;
        --cream: #171f2d;
        --accent: #a99bff;
        --accent-2: #5fcab6;
        --muted: #98a6ba;
        --border: #2b3547;
        --accent-light: #1d2440;
        --focus: rgba(169, 155, 255, 0.7);
      }

:root[data-theme="dark"] /* These elements used var(--ink)/var(--paper) as backgrounds; keep them
         dark now that those vars carry the light text role. */
      header {
        background: #0a0f18;
        color: #e7eaf3;
      }

:root[data-theme="dark"] .term-card.highlight {
        background: #0f1626;
        border-color: #0f1626;
        color: rgba(247, 248, 252, 0.92);
      }

:root[data-theme="dark"] .term-desc {
        color: #c6cfdc;
      }

:root[data-theme="dark"] #write .term-desc a {
        color: #7fd3c2;
        text-decoration-color: rgba(127, 211, 194, 0.55);
      }

:root[data-theme="dark"] #write .term-desc a:hover {
        color: #b7f3e7;
        text-decoration-color: currentColor;
      }

:root[data-theme="dark"] #write .term-card.highlight .term-desc a {
        color: #c4b8ff;
        text-decoration-color: rgba(196, 184, 255, 0.58);
      }

:root[data-theme="dark"] #write .term-desc .guide-note {
        background: rgba(169, 155, 255, 0.1);
        color: #c2ccdb;
      }

:root[data-theme="dark"] .prism-back-home {
        background: rgba(18, 24, 36, 0.92);
        color: #c6cfdc;
        border-color: rgba(255, 255, 255, 0.14);
      }

:root[data-theme="dark"] .prism-back-home:hover {
        color: #ffffff;
        border-color: rgba(255, 255, 255, 0.28);
      }

:root[data-theme="dark"] .prism-back-home:focus-visible {
        outline: 2px solid #7fd3c2;
        outline-offset: 2px;
      }

    @media (max-width: 420px) {
      #write {
        font-size: 15px !important;
      }

      header {
        padding: 3rem 1.1rem 2.3rem;
      }

      .intro-section {
        padding: 2.2rem 1.1rem 1.4rem;
      }

      .main-content {
        padding: 0 1.1rem 3.1rem;
      }

      .term-en {
        font-size: 1.35rem;
      }

      .term-desc {
        font-size: 0.88rem;
      }

      .toc-toggle-btn {
        width: 46px;
        height: 46px;
      }
    }